Rockwell Automation 1756-SPESMNRMXT GuardLogix Controllers User Manual - Manuel (Page 80)

80 Rockwell Automation Publication 1756-UM020I-EN-P - August 2012
Chapter 5 Add, Configure, Monitor, and Replace CIP Safety I/O
If the entire routable CIP Safety control system is not being relied on to maintain
SIL 3/PLe during the replacement and functional testing of a module, the
Configure Always feature may be used. Go to
Replacement with ‘Configure
Always’ Enabled on page 84 .
Module replacement is configured on the Safety tab of the GuardLogix
controller.
Figure 22 - Safety I/O Module Replacement
Replacement with ‘Configure Only When No Safety Signature Exists’
Enabled
When a module is replaced, the configuration will be downloaded from the
safety controller if the DeviceID of the new module matches the original. The
DeviceID is a combination of the node/IP address and the Safety Network
Number (SNN) and is updated whenever the SNN is set.
If the project is configured as ‘Configure Only When No Safety Signature Exists’,
follow the appropriate steps in
Table 24 to replace a POINT Guard I/O module
based on your scenario. Once you have completed the steps correctly, the
DeviceID will match the original, enabling the safety controller to download the
proper module configuration, and re-establish the safety connection.
Table 24 - Replacing a Module
GuardLogix Safety
Signature Exists Replacement
Module Condition Action Required
No No SNN
(Out-of-box) None. The module is ready for use.
Yes or No Same SNN as original
safety task
configuration None. The module is ready for use.